Circle APIs
Payments, wallets and marketplaces APIs powered by USDC
Circle APIs launched on March 13, 2020 with 2 votes. The site was still online in September 2026, 6 years on.
What it does
We’re combining the USD Coin (USDC) stablecoin, banking connectivity and wallet infrastructure in powerful APIs, so developers are freed to build what’s next for finance and internet commerce.
Explore Circle’s developer docs, tools, code samples, events, and product updates to build and launch production-ready apps faster on Circle’s full-stack platform.
Explore the docs, tools, code samples, events, and updates you need to build and launch production-ready apps with Circle’s full-stack platform. Get started for free in the Circle Developer Console. Explore the complete stack for building with USDC from wallets, contracts, crosschain infrastructure, gas abstraction, and app development. Each product can be used on its own, but together they cover the full system: Wallets for UX, Contracts for execution, Gateway for balance abstraction, CCTP for cross-chain movement, and Arc for coordination. Access the tools, docs, and settings you need to build and manage with Circle in one place. Build real-world financial apps with stablecoin-native…from circle.com
Does a similar job
all alternatives →

Crypto and FinTech API by Front2022 · meshpay.com · ▲103Real-time data aggregation and asset transfer for fintech
x4022025 · x402.org · ▲119Hi HN – excited to announce x402, initially developed by Coinbase (YC 12) x402 lets any HTTP API charge per request without issuing API keys or storing credit cards. Buyers (humans or AI agents) keep funds in their own wallet and dynamically discover compatible endpoints, call them as usual, and automatically pay a microtransaction in USDC or other tokens to settle. 90 second demo: https://www.youtube.com/watch?v=PV-L2AfLhJg Problem: Every time we want to use a new API we have to: find the service online create a developer account, copy a secret key into env vars, pre-fund or…

- AAAn API to store balances and transactions2020 · ▲151
Hey everyone! I'm Rob and I want to share what I've built - a solid ledger behind simple API: https://decimals.app The ledger is a key piece of any financial system and is easy to get the design wrong, resulting in troubles for making sure money movements are adding up. I took a lot of inspiration from good designs from Square, Uber, and others for the scalability and security aspects. And on the usability side, I applied many concepts from the Ledger CLI, making it very easy to use. I'm really happy I get to show this to you all, thank you for reading about it! Please let me know…
More dev tools this month
the category →
Contribute to oosexgang/hackios-xnu-kernel development by creating an account on GitHub.
Dev tools · 5d ago · github.com

OpenBot▲362Grok Bot alternative: free, local, open-source, multiplayer
Dev tools · 28d ago · openbot.run
Talanoa▲346Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…
Dev tools · 26d ago · talanoa.email


Source: Product Hunt launch ↗
Launched alongside, March 2020
the whole month →

Fraidycat▲807Life & fun · 2020 · fraidyc.at
MainStreet▲540Founders: You're owed $50K. Get it back in 20 minutes 🤝
Commerce · 2020 · mainstreet.com

108 free flat illustrations with customizable characters
Dev tools · 2020 · patterns.page
- TF
Life & fun · 2020 · bingetogether.com